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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4dbde8d1166a304cdd8340ee0d71a2fcc23ce411340acc0f4f58cb5743b718f' 
  AND token = '7bRjDfKYsC2cYIX8a0a3diBZ+T+DFfZPbL+Sx1N9SAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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