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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3ea0bc21efac71315e790a4eadd252d44bae90b24f2cffa868e0e986dff8225' 
  AND token = '3F/dBpXz0BOsFklLkWUIhRaLzYpK0SXuvxUx7KeIOCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00071

JSON explain

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