Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4c8b2fe904fa4c3a62af8dd5023f694d53937d7a32397b1c43037e1ed366519' 
  AND token = 'aESVoF4oO5CKTBcFpJRIOtBp3F4F+dYXCi1Iz2f+fTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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