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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee341b3b9e4fec6caa6b0839ddad73b4e2af050ce7f373690cc27b8c4d87dcb3' 
  AND token = 'OWIuyCc1YnPXwp+AO0b27AE4Oa4454T4MGZrOnGIFAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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