Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'deb14e503bf72593daf3dd2da400204bd556eda2e9ac03a6c5924c16ddd5de8d' 
  AND token = 'ptQ1X04VwPkrabvF+nLF6s2mG0jkbTG+/xNsDpDdr2k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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