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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22292fd83df9c1d647544db39f65102f36597e54beeeed26bf7047e8b9deff33' 
  AND token = 'dXXSSc65jxI9T25TomelV2V9kLPh8O9xtvhQoPuc4nc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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