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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73091297ed9b684f8df010bf25b676266d0ad779daa001c84765ed2193775177' 
  AND token = 'n2yVwsd3a5axM4xrEq1cXVl4xq5rl5cX7wDzNKR8l6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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