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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '066ff4fe625bef4f7150397a600bb7c7fac2de5905615ed84b71dc061e62e56e' 
  AND token = 'fiSP/8LDDLqxn1sJoE3Mw23Ihfev0b6QuujAfBhLnwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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