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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11ff4d102f703ccdd4ebb907a7209f5e6ca8e3f3087572b0d22d3ee953e8db3b' 
  AND token = 'GNYJh9cOnIyBX4es37kIQ05Hqo5N0KwqSk1CU25beuY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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