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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bda02650a11e9c9efb8b21b7a5294a54d8b77dd7ae468861eb65f4a2bfaacc9c' 
  AND token = 'raIjYjGzyAei7+H87tukn2hCh61u5f9NwkI8/77Bw7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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