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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b9f735c1bba90224e2205ced133dad0d91b6ce945a5b078e660569b062a0fda' 
  AND token = 'qDAx4v/ZNwOeDJXBBQ+FthyCr++JcE0TJmrApeGLZQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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