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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06a98e1ea06145934397c0838372bdaa0ec59c538e2cc18eeefd2bbe1d122105' 
  AND token = 'Jx4pV325ooAcPcIk585iLASX3zXcHN87aha6/DZe+KE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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