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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c02b505ada6ea1617baa325d2879e820913d6e439207e239ac66e0a069c2f23a' 
  AND token = '4wRRFmm1WoTgPdyz1G5PzCeUMJBl65sk5xSZbjFySxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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