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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06ca0938b4227653312ce1de15a91f0d78ff1993df0b8d9b84ed3ecf771113bc' 
  AND token = 'GuT7sJdQ15uhNpPgaQHu5lFTVSTzB7nGDDN9RWmrhRI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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