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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e2223868bc37b84ff7ac91ea11c0685d349d30533184ef0d745664f42e22158' 
  AND token = 'v2z5sm52KEsmcyeuIYSe8iunqL7iIes/84+qwhFIwdk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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