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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89686bf98714ad4dfb1dbb20d86f4b79dc15c1ae8ceb16f226ab417ef255a11b' 
  AND token = 'c2h33Hb+XgbZOirqDX7/alCnhZlMrf4inEru9nU7zQ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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