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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06a12404ca34ae26d0c92c69f706e68fa2acb5aa800b31268433b64c5a8d9876' 
  AND token = '1UjwAplSZcsR+RDLeShLLW+ZZAC8CZqBkCk2D/CTJ7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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