Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57d3d7e26d7d2207f3fcb3954c98e9e38ac83f3f449478aa8e0534dc66137f61' 
  AND token = 'yX09xWhPpJn0EOHkk91ybh1EkvfTPM0Wzb/iH4pOUQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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