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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2127d7bd8c298d7b435e288ace39746be86cdb6e85d7fa1f659f41312a2d929c' 
  AND token = 'qu8c0QvmM70zrgejxgTqYBfEkPsw007QXPgrgmhk3hI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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