Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fec9532f01f4c5a76f5af34b2d80ec21d136c91725795a638b75fad2902db177' 
  AND token = 'nf+FP3nEByU7ijR0ESWXlURs/ZoLxxyq2+bon5Jdu9Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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