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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dec21c8a90c85524c94cf9dfa616b05531a001ba4b85f7b44bcbb719c6d7c33c' 
  AND token = 'VpP77yD/SpaJvVw46/sQha3uiG20Qaxm7ZV9L9XDoKY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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