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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da5b07dae6e54f33631e30ab730ab6c969bfd5590ba8d48cba50e20aa3d0ffc2' 
  AND token = 'ygqrfAKbUvoM4I6qIV9D/cYuL4YMz/7qPAFdPUTjoZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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