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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c7141ade0ba39e9f7d4b9de1ad85c33f0d9a41ab0f010f80972a7f1960931a1e' 
  AND token = 'JtkQ7NEVdXtlQCnhMy8eyAhUTeCq4DkEGuo00b6hUMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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