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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc6c1100b7a9629d9fe8b13bdaa03ea9234c9a78b0b0db9e8791ae867587bc3f' 
  AND token = '1Xj0oJseW+HXgB0TRyABpvAIMJVD08ER/K14kiCsTLk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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