Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5da3eb10f7f033ab26200e11246b2b03cfe2a858a13eaa6571610a22f9cc215' 
  AND token = 'TSnKFULkO3O6ntzRbwHam9I8n4W+B4JGfCez1UVvw6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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