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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '741351690ce5a2563c97c9ca84be57c2a02e3fb25d8ce9795da320d3f5b16e5a' 
  AND token = 'KljEXcmK3XFoINI+rPjXRnkvNl3V/obucx1S5sQ1JWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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