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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '83f3abff734c8fddaf8d458eac018ac9f58130da0fc02861f2d07574e66f3ef0' 
  AND token = 'zU6rD6x9waVtuyOlmxkP24YX6M7531JMgAXaHLrxTRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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