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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bd198ba85ca10c004c79d9bc1f9d04e5ee60027dc92f1c8c90fa3f620d6f9e2' 
  AND token = 'OiGojkRo/nWKya7QkTmyayBK1jezOl95INNq85xFzjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00085

JSON explain

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