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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac0e2001703a9c43db3fe8cb58267b9d33501c0cda4976471fac9dd69a4cb275' 
  AND token = 'd7Z3WCaZIGjdX/la0xpOdAqK5QNP8637fh8E342g2WA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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