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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95161bf91322eb5ec3dcd79b7c044db02b5443d3dc0f107f62bd8c9d6db9227b' 
  AND token = '0IxLBeK8XdsN42BRHJnfUaMr7gBKEE8wdcBipKeWYHM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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