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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '130c2d5d08c77a15ae33e1713d6a79af02764d127be828ea25006f28fa4337cd' 
  AND token = 'F8UegxuzT7jN81riR1YK0oIyXMH708y/GCAwxXHg9pA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}