Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '03ce4d374f0b95f6c734b5a9551b0b33af2a3fc6dc5fb02819d3140ba1116018' 
  AND token = 'HO4slgrsriAI2K5LzsQkFuLMVv0cbZLLRHi5/ZTbaG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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