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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '130381efe5b0820852898e2989d341e1ed5aeabb1df7a12f837afc4ab1db7069' 
  AND token = 'lmEus5FrD39RrMbMjWtyz4tUijaNKs7WhAR8tQF9wCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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