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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9994899b378c5402b059468acf218907023fbc59e17e7f4c7257d52c11a7e481' 
  AND token = 'F8ctpOyVSb/Z8x1KYbPr+PDjh706SkjVvAqm+kI2F9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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