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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1f6d170d5689114f0292354b054a1b6e266e513de8ee33b1f6c55e0f6121480f' 
  AND token = 'BG3aAdDe/lc3yE4eMROyRy1zIjBp95xXYV7sNr9xxw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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