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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eabde78b26088dea78290d6a6be445ab7933e329494379ca7fe4e3161a6771b9' 
  AND token = '02j5UCuojCAGYvy00o+6lX0S+bD/x5dhcsKDdSDicjs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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