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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bfad2b690781fcb20370fd85c058ddee941c584ced9c7f55300b6ab4ba0b23dc' 
  AND token = '2mL5TOqIYdbba7ACQ/kVq3/+ticYPWIiZws7OBg97Ig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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