Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7d1b2cfea0fe2d251ffc32fd2ca53571a29fc7b49a096626aca50c2d46d3f3f' 
  AND token = '+s/Cm4e04wjTJrvoE0Aa3/o7135DssNxf0QRESLNHSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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