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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0af7c49e1fdb0acd506b5984743b1093e63144b4efbbdbab4a7f9721e7fe609' 
  AND token = 'mxwTWR99J+/hGBN2zOvuFib1cBVury/yha16QR3xw2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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