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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd9a2170e9d571ebf5585a60fb2a87dea44c5e26d4fdd4113e75e88d996845bc9' 
  AND token = 'XyDynGnjUtpugDwCzVIC+xgIiWvX+XQxd9mnrCooar0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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